s390/delay: remove udelay_simple()

udelay_simple() callers can make use of the now simplified udelay()
implementation. No need to keep it.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

1 files changed, 6 insertions, 28 deletions

diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index 928b1dbe182c..f289afeb3f31 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -19,13 +19,6 @@
 #include <asm/div64.h>
 #include <asm/idle.h>
 
-static DEFINE_STATIC_KEY_FALSE(udelay_ready);
-
-void __init udelay_enable(void)
-{
-	static_branch_enable(&udelay_ready);
-}
-
 void __delay(unsigned long loops)
 {
         /*
@@ -39,40 +32,25 @@ void __delay(unsigned long loops)
 }
 EXPORT_SYMBOL(__delay);
 
-static void delay_loop(unsigned long delta, bool simple)
+static void delay_loop(unsigned long delta)
 {
 	unsigned long end;
 
-	if (static_branch_likely(&udelay_ready) && !simple) {
-		end = get_tod_clock_monotonic() + delta;
-		while (!tod_after(get_tod_clock_monotonic(), end))
-			cpu_relax();
-	} else {
-		end = get_tod_clock() + delta;
-		while (!tod_after(get_tod_clock(), end))
-			cpu_relax();
-	}
+	end = get_tod_clock_monotonic() + delta;
+	while (!tod_after(get_tod_clock_monotonic(), end))
+		cpu_relax();
 }
 
 void __udelay(unsigned long usecs)
 {
-	delay_loop(usecs << 12, 0);
+	delay_loop(usecs << 12);
 }
 EXPORT_SYMBOL(__udelay);
 
-/*
- * Simple udelay variant. To be used on startup and reboot
- * when the interrupt handler isn't working.
- */
-void udelay_simple(unsigned long usecs)
-{
-	delay_loop(usecs << 12, 1);
-}
-
 void __ndelay(unsigned long nsecs)
 {
 	nsecs <<= 9;
 	do_div(nsecs, 125);
-	delay_loop(nsecs, 0);
+	delay_loop(nsecs);
 }
 EXPORT_SYMBOL(__ndelay);